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This paper presents a 40-GS/s continuous-time band-pass ΔΣ analog-to-digital converter centered at 2 GHz for wireless base station applications. The ADC consists of a fourth-order loop with multiple feedback and is designed entirely in the s-domain. The circuit achieves an SNDR of 55 dB and 52 dB over bandwidths of 60 MHz and 120 MHz, respectively, and an SFDR of 61 dB with a single-ended 11P3 of +4 dBm. The center frequency is tunable from 1.8 to 2 GHz. It employs a Gm-LCVAR filter based on a MOS-HBT cascode transconductor with an NFMIN of 2.29 dB. The entire circuit is implemented in a 130-nm SiGe BiCMOS technology with 150-GHz fT SiGe HBT and dissipates 1.6 W from a 2.5-V supply. [ABSTRACT FROM AUTHOR]

Presents a technique for finding a homogeneous transformation between a pair of range images while making use of both range and intensity information obtained using a laser range scanner. Application of the technique to help control a teleoperated nuclear waste remediation systems. Generalized registration problem; Results and conclusion.

Focuses on the theoretical description of the self-mixing effect in a laser diode when used on a three-dimensional laser range imaging system. Presentation of a survey of the existing literature; Experimental results.